I've had good results Blackhawk tactical gloves for pistol shooting in chilly weather (though they're not made for arctic cold). If you're talking about using gloves to get a better hold on your .40 irrespective of weather, that's the wrong rabbit to chase: the gloves will just reduce your tactile contact with the weapon, and make the finger less sensitive on the trigger and make the grip feel fatter.

For knife and tomahawk advice, I'd steer you to the edged weapons sections in GATE.

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